/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.tsfile.read.filter.basic;

import org.apache.iotdb.tsfile.read.filter.factory.FilterFactory;

import java.io.DataOutputStream;
import java.io.IOException;
import java.io.Serializable;
import java.nio.ByteBuffer;
import java.util.Objects;

/**
 * Definition for binary filter operations.
 */
public abstract class BinaryFilter implements Filter, Serializable {

    private static final long serialVersionUID = 1039585564327602465L;

    protected Filter left;
    protected Filter right;

    public BinaryFilter() {
    }

    protected BinaryFilter(Filter left, Filter right) {
        this.left = left;
        this.right = right;
    }

    public void setLeft(Filter left) {
        this.left = left;
    }

    public Filter getLeft() {
        return left;
    }

    public void setRight(Filter right) {
        this.right = right;
    }

    public Filter getRight() {
        return right;
    }

    @Override
    public String toString() {
        return "( " + left + "," + right + " )";
    }

    @Override
    public abstract Filter copy();

    @Override
    public void serialize(DataOutputStream outputStream) {
        try {
            outputStream.write(getSerializeId().ordinal());
            left.serialize(outputStream);
            right.serialize(outputStream);
        } catch (IOException ignored) {
            // ignore
        }
    }

    @Override
    public void deserialize(ByteBuffer buffer) {
        left = FilterFactory.deserialize(buffer);
        right = FilterFactory.deserialize(buffer);
    }

    @Override
    public boolean equals(Object obj) {
        if (!(obj instanceof BinaryFilter)) {
            return false;
        }
        BinaryFilter other = ((BinaryFilter) obj);
        return this.left.equals(other.left)
                && this.right.equals(other.right)
                && this.getSerializeId().equals(other.getSerializeId());
    }

    @Override
    public int hashCode() {
        return Objects.hash(left, right, getSerializeId());
    }
}
